Don is going on a family cruise to the Bahamas soon. Has the internet gotten better for watching Netflix? Leo says that Royal Caribbean has spent a lot of money to improve the speed of their internet access. Called Voom, the speed has gotten fast enough to stream video, for sure. But remember that during peak times, that speed will drop dramatically, as everyone uses the available bandwidth. Keep in mind though, you will be paying for it, and it's not cheap. Additionally, some content may be location locked, and they don't really like VPNs, depending on where you're traveling.
One option is to download your Netflix content before you go. Netflix offers that option for its members who are traveling. That way, you can watch stuff from your device locally and not worry about how fast the internet is or if it's region locked.